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New Zealand mud snail found at Jones Hole hatchery; Division outlines purge, cleaning and temporary stocking changes
Summary
Staff reported eDNA and visual detections of New Zealand mud snail in Jones Hole Hatchery raceways, described immediate steps to move fish and treat infrastructure, and said some hatchery rainbow production will be reduced temporarily while cutthroat needs are prioritized.
Division staff told the Blue Ribbon council that environmental DNA and visual surveys confirmed New Zealand mud snails (Potamopyrgus antipodarum) were present in parts of Jones Hole Hatchery’s raceways and clarifier pond.
What the Division is doing now: Staff reported they have moved fish out of the affected raceways (A, B and D are cleared) and plan to purge the remaining E raceway by routing fish to waters known to be positive for the snail so they do not introduce snails to currently uninfested waters. Staff described a stepped treatment plan: pressure washing, heat treatment where feasible, physical…
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